CN113623090A - Air inlet pipeline and motor vehicle - Google Patents
Air inlet pipeline and motor vehicle Download PDFInfo
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- CN113623090A CN113623090A CN202110899974.8A CN202110899974A CN113623090A CN 113623090 A CN113623090 A CN 113623090A CN 202110899974 A CN202110899974 A CN 202110899974A CN 113623090 A CN113623090 A CN 113623090A
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- air
- air inlet
- muffling
- chamber
- connecting pipe
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- 230000030279 gene silencing Effects 0.000 claims abstract description 75
- 230000001105 regulatory effect Effects 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 9
- 238000004891 communication Methods 0.000 claims description 26
- 238000013016 damping Methods 0.000 claims description 4
- 230000003247 decreasing effect Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 16
- 238000010521 absorption reaction Methods 0.000 description 5
- 230000008030 elimination Effects 0.000 description 3
- 238000003379 elimination reaction Methods 0.000 description 3
- 230000003584 silencer Effects 0.000 description 3
- 230000001743 silencing effect Effects 0.000 description 3
- 241000220317 Rosa Species 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/02—Air cleaners
- F02M35/024—Air cleaners using filters, e.g. moistened
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10091—Air intakes; Induction systems characterised by details of intake ducts: shapes; connections; arrangements
- F02M35/10137—Flexible ducts, e.g. bellows or hoses
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/1015—Air intakes; Induction systems characterised by the engine type
- F02M35/10157—Supercharged engines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10242—Devices or means connected to or integrated into air intakes; Air intakes combined with other engine or vehicle parts
- F02M35/10255—Arrangements of valves; Multi-way valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
- F02M35/1205—Flow throttling or guiding
- F02M35/1222—Flow throttling or guiding by using adjustable or movable elements, e.g. valves, membranes, bellows, expanding or shrinking elements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
- F02M35/1255—Intake silencers ; Sound modulation, transmission or amplification using resonance
- F02M35/1261—Helmholtz resonators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
- F02M35/1255—Intake silencers ; Sound modulation, transmission or amplification using resonance
- F02M35/1266—Intake silencers ; Sound modulation, transmission or amplification using resonance comprising multiple chambers or compartments
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/14—Combined air cleaners and silencers
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Silencers (AREA)
Abstract
The invention discloses an air inlet pipeline and a motor vehicle, wherein the air inlet pipeline comprises a main pipeline, a silencing structure and a regulating valve, the main pipeline is provided with an air inlet and an air outlet, the main pipeline forms a channel communicated with the air inlet and the air outlet, the main pipeline is also provided with a first communicating port and a second communicating port which are communicated with the channel and sequentially arranged in the air inlet direction, the silencing structure is connected with the main pipeline in parallel and is provided with a silencing cavity, one end of the silencing cavity is communicated with the channel through the first communicating port, the other end of the silencing cavity is communicated with the channel through the second communicating port, the regulating valve is arranged on the silencing structure and is positioned between the first communicating port and the second communicating port, and the regulating valve realizes switching between a closed state and an open state in the process of increasing or decreasing the air inflow of the air inlet. According to the technical scheme provided by the invention, the low-frequency noise reduction is realized by opening the regulating valve, or the specific-frequency noise reduction is realized by closing the regulating valve, so that the problem that the multi-frequency or multi-frequency band noise reduction cannot be realized by the conventional air inlet pipeline is solved.
Description
Technical Field
The invention relates to the field of motor vehicles, in particular to an air inlet pipeline and a motor vehicle.
Background
An intake line is generally provided between an engine supercharger and an air cleaner of a motor vehicle for feeding air supplied from the air cleaner into the engine supercharger, and the operation of the engine generates a large amount of noise.
The existing air inlet channel is generally arranged between a cab and a container, single frequency or single frequency band noise reduction can be realized by adding a resonant cavity, but after the rotation speed of an engine is changed, noise often changes, and noise reduction frequency points or frequency band changes cannot be realized.
Disclosure of Invention
The invention mainly aims to provide an air inlet pipeline and a motor vehicle, and aims to solve the problem that the existing air inlet pipeline cannot realize multi-frequency or multi-frequency band noise reduction.
In order to achieve the above object, the present invention provides an intake pipe, wherein the intake pipe includes:
the main pipeline is provided with an air inlet and an air outlet, a channel communicated with the air inlet and the air outlet is formed in the main pipeline, the air inlet is used for being connected with the air outlet of the air filter, the air outlet is used for being communicated with the air inlet of the engine supercharger, and a first communication port and a second communication port which are communicated with the channel and are sequentially arranged in the air inlet direction are formed in the main pipeline;
the silencing structure is connected with the main pipeline in parallel and is provided with a silencing cavity, one end of the silencing cavity is communicated with the channel through the first communicating port, and the other end of the silencing cavity is communicated with the channel through the second communicating port; and the number of the first and second groups,
the governing valve is located sound-damping structure, and be located first intercommunication mouth with between the second intercommunication mouth, the governing valve is in the in-process that the air input of air inlet increases switches to the closed condition from the open condition the in-process that the air input of air inlet reduces, from the closed condition switches to the open condition.
Optionally, the muffling cavity comprises a first muffling cavity and a second muffling cavity which are sequentially connected in series in the air inlet direction, the volumes of the first muffling cavity and the second muffling cavity are different, the first communicating port is communicated with the channel and the first muffling cavity, the second communicating port is communicated with the channel and the second muffling cavity, and the regulating valve is arranged between the first muffling cavity and the second muffling cavity.
Optionally, the silencing structure comprises a first silencing main body, a second silencing main body and a connecting pipeline, the first silencing main body forms the first silencing cavity, the second silencing main body forms the second silencing cavity, the connecting pipeline is communicated between the first silencing main body and the second silencing main body and communicated with the first silencing cavity and the second silencing cavity, the air passing area of the connecting pipeline is smaller than that of the first silencing cavity and that of the second silencing cavity, and the regulating valve is arranged on the connecting pipeline.
Optionally, the muffling structure further includes a first connecting pipe and a second connecting pipe, the first connecting pipe communicates the first muffling chamber and the main pipeline, and the second connecting pipe communicates the second muffling chamber and the main pipeline;
the air passing area of the first connecting pipe is smaller than that of the first silencing cavity, and the air passing area of the second connecting pipe is smaller than that of the second silencing cavity.
Optionally, the volume of the first muffling chamber is greater than the volume of the second muffling chamber.
Optionally, the length of the first connection pipe is less than or equal to the length of the second connection pipe.
Optionally, the air passing area of the first connecting pipe is greater than or equal to the air passing area of the second connecting pipe.
Optionally, the inner wall of the muffling chamber has a concave-convex structure.
Optionally, the sound attenuation structure is disposed close to the air outlet, and a distance between the air outlet and the first communicating port is smaller than a distance between the air inlet and the second communicating port.
Optionally, the air intake pipeline further comprises a bellows arranged on the main pipeline.
Optionally, the bellows is provided between the second communication port and the intake port.
The invention also provides a motor vehicle comprising an air intake circuit as described above, the air intake circuit comprising:
the main pipeline is provided with an air inlet and an air outlet, a channel communicated with the air inlet and the air outlet is formed in the main pipeline, the air inlet is used for being connected with the air outlet of the air filter, the air outlet is used for being communicated with the air inlet of the engine supercharger, and a first communication port and a second communication port which are communicated with the channel and are sequentially arranged in the air inlet direction are formed in the main pipeline;
the silencing structure is connected with the main pipeline in parallel and is provided with a silencing cavity, one end of the silencing cavity is communicated with the channel through the first communicating port, and the other end of the silencing cavity is communicated with the channel through the second communicating port; and the number of the first and second groups,
the governing valve is located sound-damping structure, and be located first intercommunication mouth with between the second intercommunication mouth, the governing valve is in the in-process that the air input of air inlet increases switches to the closed condition from the open condition the in-process that the air input of air inlet reduces, from the closed condition switches to the open condition.
In the technical scheme provided by the invention, an air inlet pipeline comprises a main pipeline, the main pipeline is provided with an air inlet and an air outlet, the main pipeline forms a channel communicated with the air inlet and the air outlet, the air inlet is used for connecting with the air outlet of an air filter, the air outlet is used for communicating with the air inlet of an engine supercharger, noise generated by an engine enters the main pipeline from the air outlet, the air inlet pipeline is also provided with a silencing structure connected with the main pipeline in parallel, the silencing structure is provided with a silencing cavity, the silencing cavity is communicated with the channel through a first communication port and a second communication port which are sequentially arranged in the air inlet direction, a regulating valve is arranged on the silencing structure and positioned between the first communication port and the second communication port, and the regulating valve can switch between an opening state and a closing state when the air inlet amount is increased or reduced, through setting up the governing valve, when the governing valve was opened, the noise cancelling structure both ends completely with the main line intercommunication, the noise cancelling structure forms the dilatation, makes the inlet line constitutes expanding silencer structure, can realize the broad band noise elimination effect, and after engine speed rose, the engine air input increased, first intercommunication mouth with the pressure differential of second intercommunication mouth department increases, the governing valve is closed, the sound wave in the main line reachs the reflection behind the inner wall of noise elimination chamber, and the sound wave after the reflection forms the anti-phase place with the sound wave that gets into in the main line to fall the noise of another specific frequency channel, in order to solve current inlet line can't realize the problem of making an uproar falls in multifrequency or the multifrequency section.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic perspective view of an embodiment of an air intake circuit provided in the present invention;
FIG. 2 is a schematic sectional view taken along line A-A of FIG. 1;
FIG. 3 is a schematic cross-sectional view taken along line B-B in FIG. 1;
fig. 4 is a schematic cross-sectional view of C-C in fig. 1.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 100 | |
21 | |
| 1 | |
22 | |
| 11 | |
23 | Connecting |
| 12 | |
25 | First connecting |
| 13 | |
27 | Second connecting |
| 14 | |
3 | Regulating |
| 2 | Noise elimination structure |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
An intake line is generally provided between an engine supercharger and an air cleaner of a motor vehicle for feeding air supplied from the air cleaner into the engine supercharger, and the operation of the engine generates a large amount of noise. The existing air inlet channel is generally arranged between a cab and a container, single frequency or single frequency band noise reduction can be realized by adding a resonant cavity, but after the rotation speed of an engine is changed, noise often changes, and noise reduction frequency points or frequency band changes cannot be realized.
In order to solve the above problem, the present invention provides an intake pipe 100, and fig. 1 to 4 show an embodiment of the intake pipe 100 provided by the present invention.
Referring to fig. 1 and 2, the air intake pipeline 100 includes a main pipeline 1, a silencing structure 2 and a regulating valve 3, the main pipeline 1 has an air inlet 11 and an air outlet 12, the main pipeline 1 forms a channel communicating the air inlet 11 and the air outlet 12, the air inlet 11 is used for connecting the air outlet of the air cleaner, the air outlet 12 is used for communicating the air inlet of the engine supercharger, the main pipeline 1 is further provided with a first communicating port and a second communicating port which are communicated with the channel and sequentially arranged in an air intake direction, the silencing structure 2 is arranged in parallel with the main pipeline 1 and has a silencing cavity, one end of the silencing cavity is communicated with the channel through the first communicating port, the other end of the silencing cavity is communicated with the channel through the second communicating port, the regulating valve 3 is arranged on the silencing structure 2 and is located between the first communicating port and the second communicating port, the regulator valve 3 is switched from an open state to a closed state in a process in which the intake air amount of the intake port 11 is increased, and is switched from the closed state to the open state in a process in which the intake air amount of the intake port 11 is decreased.
In the technical scheme provided by the invention, an air inlet pipeline 100 comprises a main pipeline 1, the main pipeline 1 is provided with an air inlet 11 and an air outlet 12, the main pipeline 1 forms a channel communicated with the air inlet 11 and the air outlet 12, the air inlet 11 is used for connecting with the air outlet of an air filter, the air outlet 12 is used for communicating with the air inlet of an engine supercharger, noise generated by an engine enters the main pipeline 1 from the air outlet 12, the air inlet pipeline 100 is further provided with a silencing structure 2 connected with the main pipeline 1 in parallel, the silencing structure 2 is provided with a silencing cavity, the silencing cavity is communicated with the channel through a first communication port and a second communication port which are sequentially arranged in the air inlet direction, a regulating valve 3 is arranged on the silencing structure 2 and between the first communication port and the second communication port, and when the air inlet amount is increased or decreased, switching between the open and closed states is possible, by providing the regulating valve 3, when said regulating valve 3 is open, the two ends of the silencing structure 2 are completely communicated with the main pipeline 1, the silencing structure 2 forms expansion, so that the air inlet pipeline 100 forms an expansion type silencer structure, can realize the wide-frequency-band silencing effect, when the rotating speed of the engine rises, the noise generated by the engine is converted into the noise of a higher frequency band, the air input of the engine is increased at the moment, the pressure difference between the first communication port and the second communication port increases, the regulating valve 3 is closed, the sound wave in the main pipeline 1 reaches the inner wall of the anechoic cavity and then is reflected, the reflected sound wave and the entering sound wave form an opposite phase, therefore, noise of another specific frequency band is reduced, and the problem that the existing air inlet pipeline cannot realize multi-frequency or multi-frequency band noise reduction is solved.
It should be noted that the specific frequency may be a high frequency noise, a low frequency noise or a medium frequency noise, the high frequency and the low frequency are only a relative concept, and after the adjusting valve 3 is closed, the frequency band of the noise to be eliminated is higher than that of the noise to be eliminated when the adjusting valve 3 is opened before, which may be called as a high frequency noise or a specific frequency noise.
Further, in order to enable the intake pipeline 100 to realize noise with more frequency bands or frequencies, in this embodiment, the muffling chamber includes a first muffling chamber 21 and a second muffling chamber 22 that are connected in series in the intake direction, because the muffling effect is related to the volume of the muffling chamber, generally, the larger the volume of the muffling chamber is, the better the noise reduction effect for low-frequency band or wide-frequency band sound is, and the smaller the volume of the muffling chamber is, the better the noise reduction effect for high-frequency band sound is, and in order to address sound with different frequency bands, in this embodiment, the volumes of the first muffling chamber 21 and the second muffling chamber 22 are different, the first communication port communicates the channel with the first muffling chamber 21, the second communication port communicates the channel with the second muffling chamber 22, the regulating valve 3 is disposed between the first muffling chamber 21 and the second muffling chamber 22, when the regulating valve 3 is opened, the first silencing cavity 21 and the second silencing cavity 22 form an integral silencing cavity, the silencing cavity and the main pipeline 1 form an expansion type silencing structure 2, according to the above principle, the first muffling chamber 21, the second muffling chamber 22 and the air inlet pipeline 100 can reduce noise in a reduced frequency band, because the volumes of the first muffling chamber 21 and the second muffling chamber 22 are different, the first muffling chamber 21 and the second muffling chamber 22 are different in frequency band of noise, respectively, and when the regulating valve 3 is closed, according to the same principle, the sound wave in the main pipeline 1 reaches the inner wall of the first muffling cavity 21 through the first communication port and then is reflected, and the reflected sound wave and the entering sound wave form an opposite phase, so that noise of one higher frequency band is reduced; the sound wave in the main pipeline 1 reaches the inner wall of the second muffling cavity 22 through the second communicating port and then is reflected, and the reflected sound wave and the entered sound wave form an opposite phase, so that noise of another higher frequency band is reduced, and thus the air inlet pipeline 100 can reduce noise of two higher frequency bands.
Further, the regulating valve 3 is a one-way valve, and the one-way valve is in an open state under the conditions that the engine rotating speed is not high and the air intake amount is not large, so that the first muffling cavity 21 and the second muffling cavity 22 form an integral muffling cavity; when the engine speed is increased and the intake air amount is increased, high-frequency noise is generated more, and at this time, the check valve is in a closed state, so that the first muffling chamber 21 and the second muffling chamber 22 are separated to form two muffling chambers.
Further, referring to fig. 3 and 4, in this embodiment, the muffling structure 2 includes a first muffling main body, a second muffling main body, and a connecting pipeline 23, where the first muffling main body forms the first muffling cavity 21, the second muffling main body forms the second muffling cavity 22, the connecting pipeline 23 is disposed between the first muffling main body and the second muffling main body and is communicated with the first muffling cavity 21 and the second muffling cavity 22, an air passing area of the connecting pipeline 23 is smaller than that of the first muffling cavity 21 and the second muffling cavity 22, the adjusting valve 3 is disposed on the connecting pipeline 23, the first muffling cavity 21 and the second muffling cavity 22 can be set as two independent muffling cavities, an internal structure can be set in each muffling cavity according to noise reduction requirements, and then the connecting pipeline 23 is set to occupy as few structural features of the muffling cavity as possible, the two silencing cavities are communicated, then the adjusting valve 3 is arranged on the connecting pipeline 23, and the air passing area of the connecting pipeline 23 is smaller than that of the first silencing cavity 21 and that of the second silencing cavity 22, so that the control of the adjusting valve 3 is more convenient.
Further, in order to enable the sound attenuation structure 2 to achieve a better sound attenuation effect, in this embodiment, the sound attenuation structure 2 further includes a first connection pipe 25 and a second connection pipe 27, the first connection pipe 25 communicates the first sound attenuation chamber 21 and the main pipeline 1, the second connection pipe 27 communicates the second sound attenuation chamber 22 and the main pipeline 1, an air passing area of the first connection pipe 25 is smaller than that of the first sound attenuation chamber 21, and an air passing area of the second connection pipe 27 is smaller than that of the second sound attenuation chamber 22. Since there are air columns in the first connection pipe 25 and the second connection pipe 27, the air columns in the first connection pipe 25 and the second connection pipe 27 may vibrate due to sound waves, and the sound energy may be consumed by the vibration of the air columns in the first connection pipe 25 and the second connection pipe 27, thereby further reducing noise. When the regulating valve 3 is closed, sound enters the first muffling chamber 21 through the first connecting pipe 25, said first connecting pipe 25 and said first muffling chamber 21 jointly form a first muffling structure, by adjusting the relevant parameters of said first connecting pipe 25 and said first muffling chamber 21, so that said first connecting pipe 25 and said first muffling chamber 21 form a hercules muffler, meanwhile, sound enters the second muffling chamber 22 through the second connecting pipe 27, the second connecting pipe 27 and the second muffling chamber 22 together form a second muffling structure, by adjusting the relevant parameters of the second connecting pipe 27 and the second muffling chamber 22, the second connecting pipe 27 and the second muffling chamber 22 also form another helmholtz muffler, which is a basic acoustic model and has the sound absorption principle: the single resonator can be seen to be composed of several acoustic elements with different acoustic effects, and the air in the open pipe and near the pipe orifice vibrates along with the sound waves and is an acoustic mass element; the pressure in the cavity changes along with the expansion and contraction of air, and the cavity is a compliant element; the air in the cavity vibrates with the sound waves to a certain extent and also has a certain sound quality. The vibration friction of air on the wall surface of the opening can cause acoustic energy loss due to viscous damping and heat conduction, and the acoustic effect of the air is acoustic resistance. When the frequency of the incident sound wave approaches the natural frequency of the resonator, the air column of the throat produces strong vibrations, during which the sound energy is dissipated by overcoming the frictional resistance. Conversely, when the frequency of the incident sound wave is far from the natural frequency of the resonator, the resonator vibrates very weakly, so that the sound absorption effect is very small, the sound absorption coefficient of the visible resonator varies with the frequency, and the highest sound absorption coefficient occurs at the resonant frequency. By providing two hercules mufflers, the effect of consuming acoustic energy is made to be relatively better.
Further, generally according to the principle of a helmholtz silencer, the volume of the silencing cavity is small, the pipe diameter of the connecting pipe is small, when the length of the connecting pipe is long, the noise silencing effect on the high frequency band is good, the volume of the silencing cavity is large, the pipe diameter of the connecting pipe is large, when the length of the connecting pipe is short, the noise silencing effect on the low frequency band is good, in order to enable the noise reduction structure 2 to realize the noise reduction of multiple frequency bands, in the first embodiment, the volume of the first silencing cavity 21 is larger than that of the second silencing cavity 22, and the first silencing cavity 21 is better than that of the second silencing cavity 22 in the broadband noise reduction effect. In the second embodiment, the length of the first connection pipe 25 is less than or equal to the length of the second connection pipe 27, the first connection pipe 25 achieves better effect of silencing broadband noise than the second connection pipe 27, in the third embodiment, the overfire air area of the first connection pipe 25 is greater than or equal to the overfire air area of the second connection pipe 27, the first connection pipe 25 also achieves better effect of silencing broadband noise than the second connection pipe 27, in the fourth embodiment, the volume of the first silencing chamber 21 is greater than the volume of the second silencing chamber 22, the length of the first connection pipe 25 is less than or equal to the length of the second connection pipe 27, in the fifth embodiment, the volume of the first silencing chamber 21 is greater than the volume of the second silencing chamber 22, and the overfire air area of the first connection pipe 25 is greater than or equal to the overfire air area of the second connection pipe 27, in the sixth embodiment, the length of the first connecting pipe 25 is less than or equal to the length of the second connecting pipe 27, the overfire area of the first connecting pipe 25 is greater than or equal to the overfire area of the second connecting pipe 27, in the most preferred embodiment, the volume of the first muffling chamber 21 is greater than the volume of the second muffling chamber 22, the length of the first connecting pipe 25 is less than or equal to the length of the second connecting pipe 27, and the overfire area of the first connecting pipe 25 is greater than or equal to the overfire area of the second connecting pipe 27, so that the noise reduction effect of the first muffling structure 2 as a whole for lower frequencies is optimal relative to the second muffling structure 2. In a concrete reality, the first muffling chamber 21 is arranged as 1/4 wave tubes, the second muffling chamber 22 is arranged as 1/4 wave tubes, and the first connecting tube 25 and the second connecting tube 27 are arranged as 1/2 wave tubes.
Further, in order to enable the interior of the muffling cavity to achieve a good muffling effect, a certain modeling structure and muffling elements are arranged in the interior of the general muffling cavity.
Further, because of current air inlet pipeline distance is far away from the engine along pipeline direction, belongs to the end of noise, and therefore noise reduction is limited, in this embodiment, noise cancelling structure 2 is close to gas outlet 12 sets up, gas outlet 12 with the distance of first intercommunication mouth is less than air inlet 11 with the distance of second intercommunication mouth, because of the noise source comes from the motor vehicle engine, will noise cancelling structure 2 is close to gas outlet 12 is close to promptly the engine supercharger sets up for the noise just can be quilt at the top noise cancelling structure 2 makes an uproar, makes whole noise reduction be superior to setting up at the noise end like this noise cancelling structure 2 to utilize the peripheral space setting of pipeline noise cancelling structure 2, can effectively utilize the space.
Further, in this embodiment, the intake duct 100 further includes a corrugated pipe 13 disposed on the main duct 1, and since the multi-section corrugated structure on the corrugated pipe 13 plays a role of buffering vibration, a certain effect is also achieved for noise reduction at a higher frequency.
Further, in the present embodiment, since the sound attenuation structure 2 is disposed close to the air outlet 12, the corrugated tube 13 is disposed between the second communication port and the air inlet 11 for reasonably and optimally combining the corrugated tube 13 and the sound attenuation structure 2 to perform sound attenuation and shock absorption.
Further, the air inlet pipeline 100 is also provided with a breather joint 14, and the breather joint is connected with oil gas from an engine, so that the oil gas is prevented from being directly discharged into the atmosphere to form pollution.
In addition, in order to achieve the above object, the present invention further provides a motor vehicle, which may be a truck or a trailer, without limitation, and includes the intake duct 100 according to the above technical solution. It should be noted that, the detailed structure of the intake pipeline 100 of the motor vehicle may refer to the above embodiment of the intake pipeline 100, and is not described herein again; since the intake pipe 100 is used in the motor vehicle of the present invention, embodiments of the motor vehicle of the present invention include all technical solutions of all embodiments of the intake pipe 100, and the achieved technical effects are also completely the same, and are not described herein again.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. An air intake circuit, comprising:
the main pipeline is provided with an air inlet and an air outlet, a channel communicated with the air inlet and the air outlet is formed in the main pipeline, the air inlet is used for being connected with the air outlet of the air filter, the air outlet is used for being communicated with the air inlet of the engine supercharger, and a first communication port and a second communication port which are communicated with the channel and are sequentially arranged in the air inlet direction are formed in the main pipeline;
the silencing structure is connected with the main pipeline in parallel and is provided with a silencing cavity, one end of the silencing cavity is communicated with the channel through the first communicating port, and the other end of the silencing cavity is communicated with the channel through the second communicating port; and the number of the first and second groups,
the governing valve is located sound-damping structure, and be located first intercommunication mouth with between the second intercommunication mouth, the governing valve is in the in-process that the air input of air inlet increases switches to the closed condition from the open condition the in-process that the air input of air inlet reduces, from the closed condition switches to the open condition.
2. The intake manifold of claim 1, wherein the muffling chamber comprises a first muffling chamber and a second muffling chamber connected in series in the intake direction, the first muffling chamber and the second muffling chamber have different volumes, the first communication port communicates the passage and the first muffling chamber, the second communication port communicates the passage and the second muffling chamber, and the regulating valve is provided between the first muffling chamber and the second muffling chamber.
3. The intake pipe of claim 2, wherein the muffler structure includes a first muffler body, a second muffler body, and a connecting pipe, the first muffler body forms the first muffler chamber, the second muffler body forms the second muffler chamber, the connecting pipe communicates between the first muffler body and the second muffler body and communicates the first muffler chamber and the second muffler chamber, the connecting pipe has a smaller air flow area than the first muffler chamber and the second muffler chamber, and the regulating valve is disposed in the connecting pipe.
4. The intake conduit of claim 2, wherein the muffling structure further comprises a first connecting tube and a second connecting tube, the first connecting tube communicating the first muffling chamber and the main conduit, the second connecting tube communicating the second muffling chamber and the main conduit;
the air passing area of the first connecting pipe is smaller than that of the first silencing cavity, and the air passing area of the second connecting pipe is smaller than that of the second silencing cavity.
5. The air intake circuit of claim 4, wherein the first muffling chamber has a volume that is greater than a volume of the second muffling chamber; and/or the presence of a gas in the gas,
the length of the first connecting pipe is less than or equal to that of the second connecting pipe; and/or the presence of a gas in the gas,
the air passing area of the first connecting pipe is larger than or equal to that of the second connecting pipe.
6. The air intake conduit according to claim 1, wherein an inner wall of the muffling chamber has a concavo-convex configuration.
7. The intake duct of claim 1, wherein the sound attenuating structure is disposed adjacent the outlet port, and the outlet port is spaced from the first communication port by a distance less than the inlet port is spaced from the second communication port.
8. The air intake conduit of claim 1, further comprising a bellows disposed on the main conduit.
9. The intake conduit according to claim 8, wherein the bellows is provided between the second communication port and the intake port.
10. A motor vehicle, characterized in that it comprises an air intake circuit according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110899974.8A CN113623090A (en) | 2021-08-05 | 2021-08-05 | Air inlet pipeline and motor vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110899974.8A CN113623090A (en) | 2021-08-05 | 2021-08-05 | Air inlet pipeline and motor vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113623090A true CN113623090A (en) | 2021-11-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110899974.8A Pending CN113623090A (en) | 2021-08-05 | 2021-08-05 | Air inlet pipeline and motor vehicle |
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| CN (1) | CN113623090A (en) |
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| US5723828A (en) * | 1994-08-26 | 1998-03-03 | Excell Corporation | Hollow plastic product having a sound attenuator |
| US6422192B1 (en) * | 1999-10-12 | 2002-07-23 | Siemens Vdo Automotive, Inc. | Expansion reservoir of variable volume for engine air induction system |
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| CN107355323A (en) * | 2017-08-16 | 2017-11-17 | 冉超 | A kind of automotive air intake noise sound arrester |
| CN107542608A (en) * | 2016-06-29 | 2018-01-05 | 张家港市五湖新材料技术开发有限公司 | A kind of novel air intaking device |
| CN112555072A (en) * | 2020-12-08 | 2021-03-26 | 安徽江淮汽车集团股份有限公司 | Amortization structure and car |
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2021
- 2021-08-05 CN CN202110899974.8A patent/CN113623090A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6022021A (en) * | 1983-07-15 | 1985-02-04 | Nippon Denso Co Ltd | Variable resonator |
| US5723828A (en) * | 1994-08-26 | 1998-03-03 | Excell Corporation | Hollow plastic product having a sound attenuator |
| US6422192B1 (en) * | 1999-10-12 | 2002-07-23 | Siemens Vdo Automotive, Inc. | Expansion reservoir of variable volume for engine air induction system |
| US20070044747A1 (en) * | 2005-08-26 | 2007-03-01 | Toyoda Gosei Co., Ltd. | Air intake sound control structure |
| CN202946272U (en) * | 2011-11-07 | 2013-05-22 | 福特环球技术公司 | Engine |
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Application publication date: 20211109 |
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